Feature:it is perfect for holding cupboard doors or lids in the open position,for camper trailers caravans , motorhomes , tool boxes , toy boxes , home or office.The Pneumatic Stay allows you to open the cupboard or lid VERY easily and then requires you to use a little force to close it again. How much force is up to you as you can adjust it and then its the same amount of force to close each time thereafter.it is available for up-turning wooden door and aluminum-frame door.the weight-lifting is 80N. Size:Total 27.3cm long,one end of the pole 3x1.7x1.6cm